Chili Lime Sweet Potato Salad

INGREDIENTS: dressing: -2 Packets Stevia (no calorie sweetener) -Zest of 1 lime -2 tablespoons lime juice -1 tablespoon chopped fresh cilantro -1/2 c. sliced red onion -1 tbsp Chile Powder -1/2 teaspoon ground cumin -1/4 (plus 2 tbsp for brushing on sweet potatoes)...